Giacomo Puccini's Tosca is melodrama at its purest, a festival of lush melodies and dramatic outbursts that remains one of this composer's most popular works to this day. It is also a genuine "action opera," a realistic crime story, complete with torture, betrayal, murder, sex and suicide. And in the production from the Zurich Opera presented here, it is a gripping, heart-stopping psychosexual study of three tragically and fatally interwoven figures.